A5023363058- Hydraulic and Pneumatic Systems
- Tribology and Lubrication Engineering
- Industrial Technology and Control Systems
- Time Series Analysis and Forecasting
- Anomaly Detection Techniques and Applications
- Advanced Data Processing Techniques
- Mechanical Engineering and Vibrations Research
- Real-time simulation and control systems
- Data Stream Mining Techniques
- Cavitation Phenomena in Pumps
- Electric Power Systems and Control
Zhejiang University
2022-2024
The development of the electrification aircraft has prompted aviation hydraulic systems to shift from traditional centralized valve actuators (CVAs) electro-hydrostatic (EHAs). In this paper, aiming at demand for a quantitative comparison performance between CVAs and EHAs, CVA EHA prototypes with same power level test platform were developed. Then, based on flow dynamic models EHA, simulation experimental comparative tests conducted using different load spectrum conditions step response...
Oil film characteristics are critical to the high-reliability operation of high-pressure aviation piston pumps (APPs). However, there is still a lack research on oil modeling and characteristic analysis APPs. This paper takes at cylinder block/valve plate interface 35 MPa APP as object. By introducing full computational fluid dynamics (CFD) model considering non-isothermal cavitation effects under multi-field coupling conditions, established, which includes viscous wedge geometric model,...
Abstract This paper proposes an intelligent electric motor-driven pump (EMP) with continuously variable pressure (CVP) configuration and develops a prototype, whose output power can match the load power, effectively improving efficiency reducing heat generation of aircraft source. The EMP prototype consists motor axial piston pump. integrates position sensor to monitor control cylinder swashplate, uses servo valve thereby controlling outlet Furthermore, pressure/displacement double...
Abstract Using asymmetric cylinders to replace symmetric effectively reduces the volume and weight of electro-hydrostatic actuators (EHAs). However, have flow mismatch between rod rodless chambers. Researchers proposed using three-port valve plate (AVP) solve problem without increasing EHA. compared with traditional (SVP), impact AVP on performance axial piston pump has yet be studied. This paper establishes a mixed lubrication model cylinder block/valve interface considering asperity...
Anomaly detection of time series data plays a vital role in various scenarios with explosively growing data, such as bank flow and monitoring flow. However, the non-stationary have aroused much concern performance degradation existing anomaly methods, where concept drift causes unpredictable changes variables over time. In this paper, we put forward Drift-aware Detection (DAD) method for detecting anomalies data. DAD firstly adopts self-attention mechanism to learn an embedding group each...